nelson mandela died at the age of 95 and tributes are pouring in around the globe. >> we've lost one of the most influential and courageous and good human beings. he belongs to the ages. >> mandela served 27 years in prison after being convicted of treason with the white minority government. three years later, he won the nobel peace prize. he became the first elected black president. once again, mandela has died at 95. we'll have more later in the show. meantime, our top tech story, twitter has added the first woman to their board effective immediately. she was ceo of pearson until last year. twitter faced controversy for not having a woman board member. she tweeted, "there could not be a more exciting time to join." john is in l.a. what is the latest? >> this was a priority to have a woman join the board. there are a number of things that made her the right candidate. she is smart and a forward thinking person. speaking with someone who worked with her, she pushed the envelope in the industry. the international experience and media experience is helpful for where twitter is now. the